:root{
  --accent:#673ab7; --accent-bg:#f0ebf8; --active:#4285f4;
  --text:#202124; --muted:#5f6368; --line:#dadce0; --card:#fff; --err:#d93025;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:Roboto,Arial,sans-serif;color:var(--text);background:#fff;font-size:14px}
button{font-family:inherit;font-size:14px;cursor:pointer}
input,textarea,select{font-family:inherit;color:var(--text)}
a{color:var(--accent)}
.hidden{display:none!important}

/* top bar */
.topbar{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;padding:8px 16px;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--muted);font-size:22px;flex-shrink:0}
.logo svg{width:32px;height:40px}
.grow{flex:1;min-width:0}
.iconbtn{width:40px;height:40px;border-radius:50%;border:0;background:none;display:grid;place-items:center;color:var(--muted);flex-shrink:0}
.iconbtn:hover{background:#f1f3f4}
.iconbtn svg{width:24px;height:24px;fill:currentColor}
.btn{border:0;border-radius:4px;padding:9px 24px;font-weight:500;background:var(--accent);color:#fff;letter-spacing:.25px}
.btn:hover{filter:brightness(1.08);box-shadow:0 1px 3px rgba(0,0,0,.3)}
.btn.text{background:none;color:var(--accent);padding:9px 12px}
.btn.text:hover{background:var(--accent-bg);box-shadow:none;filter:none}
.btn.outline{background:#fff;color:var(--accent);border:1px solid var(--line)}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:500;border:0;flex-shrink:0}
.menu{position:absolute;background:#fff;border-radius:4px;box-shadow:0 2px 10px rgba(0,0,0,.25);padding:8px 0;z-index:50;min-width:180px}
.menu button{display:block;width:100%;text-align:left;border:0;background:none;padding:10px 20px}
.menu button:hover{background:#f1f3f4}
.menu .info{padding:8px 20px 12px;color:var(--muted);border-bottom:1px solid var(--line);margin-bottom:6px;word-break:break-all}

/* cards */
.page{background:var(--accent-bg);min-height:calc(100vh - 64px);padding:12px 16px 80px}
.wrap{max-width:770px;margin:0 auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:24px;margin-top:12px;position:relative}
.card.head{border-top:10px solid var(--accent);padding-top:22px}
.card.active::before{content:"";position:absolute;left:-1px;top:-1px;bottom:-1px;width:6px;background:var(--active);border-radius:8px 0 0 8px}
.card.head.active::before{top:-10px;border-radius:0 0 0 8px}

/* inputs */
.field{width:100%;border:0;border-bottom:1px solid transparent;padding:8px 0;font-size:14px;background:transparent;outline:none;resize:none;overflow:hidden}
.field:hover{border-bottom-color:var(--line)}
.field:focus{border-bottom:2px solid var(--accent);padding-bottom:7px}
.field.big{font-size:32px;line-height:40px}
.field.mid{font-size:16px}
.line-input{border:0;border-bottom:1px solid var(--line);padding:8px 0;font-size:14px;outline:none;background:transparent;width:50%;min-width:200px}
.line-input:focus{border-bottom:2px solid var(--accent)}
textarea.line-input{width:100%;resize:none;overflow:hidden}
select.sel{border:1px solid var(--line);border-radius:4px;padding:10px 12px;font-size:14px;background:#fff}

.err-text{color:var(--err);font-size:12px;display:flex;align-items:center;gap:6px;margin-top:10px}
.card.error{border-color:var(--err)}

/* toggle */
.switch{position:relative;width:36px;height:14px;display:inline-block;flex-shrink:0}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:#bdc1c6;border-radius:7px;transition:.15s;cursor:pointer}
.switch span::after{content:"";position:absolute;width:20px;height:20px;border-radius:50%;background:#fff;top:-3px;left:-2px;box-shadow:0 1px 3px rgba(0,0,0,.4);transition:.15s}
.switch input:checked + span{background:color-mix(in srgb,var(--accent) 45%,#fff)}
.switch input:checked + span::after{background:var(--accent);left:18px}

/* radio / checkbox look */
.choice{display:flex;align-items:center;gap:12px;padding:8px 0;cursor:pointer}
.choice input{accent-color:var(--accent);width:20px;height:20px;margin:0;flex-shrink:0}

.toast{position:fixed;left:24px;bottom:24px;background:#323232;color:#fff;padding:14px 24px;border-radius:4px;z-index:100;box-shadow:0 2px 6px rgba(0,0,0,.3)}

.dialog-back{position:fixed;inset:0;background:rgba(0,0,0,.4);display:grid;place-items:center;z-index:90;padding:16px}
.dialog{background:#fff;border-radius:8px;padding:24px;width:min(560px,100%);box-shadow:0 4px 24px rgba(0,0,0,.3)}
.dialog h2{font-weight:400;font-size:22px;margin:0 0 16px}
.dialog .row{display:flex;gap:8px;justify-content:flex-end;margin-top:20px}

@media (max-width:600px){
  .card{padding:20px 16px}
  .field.big{font-size:24px;line-height:32px}
  .topbar{padding:8px 8px;gap:6px}
}